Appearance
https://microsoft.github.io/monaco-editor/docs.html#interfaces/editor.IEditorZoom.html
interface IEditorZoom { onDidChangeZoomLevel: IEvent<number>; getZoomLevel(): number; setZoomLevel(zoomLevel): void; }
IEvent<number>
getZoomLevel(): number
setZoomLevel(zoomLevel): void
zoomLevel
number